#include <iostream>
using namespace std;

int x, y;
int d[] = {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int main()
{
    cin >> x >> y;
    int ret = 0;
    // 枚举月 日组合
    for(int i = 1; i <= 12; i++)
    {
        for(int j = 1; j <= d[i]; j++)
        {
            // 构造回文数
            int k = j % 10 * 1000 + j / 10 * 100 + i % 10 * 10 + i / 10;
            int num = k * 10000 + i * 100 + j;
            if(x <= num && num <= y) ret++;
        }
    }
    cout << ret << endl;
    return 0;
}